Subject
- Agriculture -- Oregon -- Statistics41
- Farm produce -- Oregon -- Statistics41
- Spraying and dusting in agriculture -- Oregon -- Willamette River Valley41
- Pesticides -- Application -- Oregon -- Willamette River Valley40
- 4-H clubs19
- Grapes -- Diseases and pests -- Control -- Oregon9
- Spraying and dusting in agriculture -- Oregon9
- Agricultural pests -- Control -- Willamette River Valley (Or.)8
- Cherry -- Diseases and pests -- Control -- Oregon -- Willamette River Valley8
- Fungicides -- Oregon8
- Peach -- Diseases and pests -- Integrated control -- Oregon8
- Pear -- Diseases and pests -- Control -- Oregon -- Willamette River Valley8
- Pesticides -- Application -- Oregon8
- Viticulture -- Oregon8
- Apples -- Diseases and pests -- Control -- Oregon -- Willamette River Valley7
- Blueberries -- Diseases and pests -- Control -- Oregon -- Willamette River Valley7
- Fruit -- Diseases and pests -- Control -- Columbia River Valley7
- Peach -- Diseases and pests -- Control -- Oregon7
- Pesticides -- Application -- Columbia River Valley7
- Spraying and dusting in agriculture -- Columbia River Valley7